/* styles.css */
:root {
    --primary: #1EB6DE;
    --primary-dark: #1892B2;
    --light-bg: #F8FCFF;
    --border: #e1e5f1;
    --text: #1e293b;
    --text-light: #475569;
    --card-bg: #ffffff;
    --toast-bg: #2c3e50;
    --switch-bg: #cbd5e1;
    --switch-active: #1ba4c8;
    --danger: #e53e3e;
}

[data-theme="dark"] {
    --primary: #1EB6DE;
    --primary-dark: #1892B2;
    --light-bg: #2d2f36;
    --border: #4a4a5a;
    --text: #f1f5f9;
    --text-light: #cbd5e1;
    --card-bg: #1e1f28;
    --toast-bg: #111827;
    --switch-bg: #4b5563;
    --switch-active: #1ba4c8;
}

.container-custom {
    max-width: 1600px;
    margin: 0 auto;
    border-radius: 5px;
    background: var(--card-bg);
    box-shadow: 0 20px 35px -12px rgba(0, 0, 0, 0.1);
    transition: background 0.2s;
    overflow: hidden;
}

.text-columns-wrapper {
    display: flex;
    gap: 24px;
    padding: 24px 24px 0 24px;
    align-items: stretch;
}

.input-column, .output-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

textarea {
    width: 100%;
    max-width: 100%;
    border: 1px solid var(--border);
    background: var(--card-bg);
    resize: vertical;
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--text);
    padding: 14px;
    outline: none;
    min-height: 380px;
    height: auto;
    box-sizing: border-box;
    overflow: auto;
}

textarea:focus {
    outline: none;
    box-shadow: none;
}

.stats-bar {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    align-items: center;
    font-size: 0.85rem;
    background: var(--light-bg);
    padding: 0px 12px;
    border-radius: 5px;
    margin: 3px 0 0 0;
    justify-content: space-between;
    min-height: 40px;
    flex-shrink: 0;
}

.stat-badge {
    background: rgba(27,164,200,0.12);
    padding: 4px 12px;
    border-radius: 20px;
    font-weight: 600;
    color: var(--primary);
}

.section-title-custom {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
}

.options-panel {
    padding: 10px 20px;
    margin-top: 5px;
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 18px;
    margin-top: 8px;
    align-items: start;
}

.option-card {
    background: var(--light-bg);
    border-radius: 8px;
    padding: 0;
    border: 1px solid var(--border);
    overflow: hidden;
    transition: all 0.2s ease;
    height: auto;
}

.option-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    user-select: none;
    padding: 14px 16px;
    background: var(--light-bg);
    transition: background 0.2s ease;
}

.option-card-header:hover {
    background: rgba(27, 164, 200, 0.08);
}

.option-card-header .option-card-title {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
    cursor: pointer;
    flex: 1;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 700;
    color: var(--primary);
    pointer-events: none;
}

.collapse-icon {
    font-size: 0.85rem;
    color: var(--primary);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    width: 28px;
    height: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    background: rgba(27, 164, 200, 0.1);
    cursor: pointer;
    flex-shrink: 0;
}

.collapse-icon:hover {
    background: rgba(27, 164, 200, 0.2);
}

.option-card.collapsed .collapse-icon {
    transform: rotate(-90deg);
}

.option-card-content {
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    max-height: 2000px;
    opacity: 1;
    padding: 0 16px 12px 16px;
}

.option-card.collapsed .option-card-content {
    max-height: 0 !important;
    opacity: 0;
    padding: 0 16px;
    visibility: hidden;
    margin: 0;
}

.option-card.collapsed {
    min-height: auto;
}

.option-card-title {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
    padding-bottom: 6px;
    border-bottom: 2px solid var(--primary);
    display: inline-block;
}

.switch-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.switch-item:last-child {
    border-bottom: none;
}

.switch-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    color: var(--text);
}

.switch-label i {
    width: 20px;
    color: var(--primary);
}

.switch {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--switch-bg);
    transition: 0.25s;
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: 0.25s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--switch-active);
}

input:checked + .slider:before {
    transform: translateX(24px);
}

.radio-group {
    display: flex;
    gap: 16px;
    margin-top: 8px;
    flex-wrap: wrap;
}

.radio-group label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    cursor: pointer;
    color: var(--text);
}

.custom-input-group {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.custom-input-group input {
    flex: 1;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--card-bg);
    color: var(--text);
}

button {
    font-family: inherit;
    font-size: 13px;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 3px;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--light-bg);
    color: var(--text);
    border: 1px solid var(--border);
    text-shadow: none;
}

.success-btn {
    background: #2c7a4d20;
    border-color: var(--primary);
    color: var(--primary);
}

.action-buttons-bar {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    padding: 16px 20px;
    background: var(--card-bg);
}

input[type="file"] {
    display: none;
}

.toast-notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--toast-bg);
    color: white;
    padding: 12px 20px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 2000;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    opacity: 0;
    transform: translateX(20px);
    transition: 0.3s;
    pointer-events: none;
}

.toast-notification.show {
    opacity: 1;
    transform: translateX(0);
}

.helper-text {
    font-size: 0.7rem;
    color: var(--text-light);
    margin-top: 8px;
}

@media (max-width: 900px) {
    .text-columns-wrapper {
        flex-direction: column;
    }
    .options-grid {
        grid-template-columns: 1fr;
    }
    textarea {
        min-height: 280px;
        height: 280px;
    }
}